Implement-holder.



A. H. HARRINGTON.

IMPLEMENT HOLDER.

APPLICATION FILED AUG.2| 1915.

1 ,1 98,72 3 Patented Sept. 19, 1916.

I worne ALBERT H. HARRINGTON, OF FALL RIVER, MASSACHUSETTS.

IMPLEMENT-HOLDER.

Specification of Letters Patent.

Patented Sept. 19, 1916.

Application filed August 2, 1915 Serial No. 43,096.

T 0 all whom it may concern Be it known that I, ALBERT H. HARRING- TON, a subject of the Dominion of Canada, and a resident of Fall River, in the county of Bristol and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Implement-Holders, of which the following is a full, clear, and exact specification.

This invention relates to means for permitting the ready substitution of fresh points for worn ones in the shanks of picks, asphalt cutters, grubbing hoes and the like. In previous constructions for this purpose there are found numerous difliculties, such as expense of manufacture, inconvenience of renewal and imperfection in use, all of which I have overcome by means of my improvements.

Referring to the drawings forming part of this specification, Figure 1 is a side view of the operative portion of a pick made in accordance with my invention. Fig. 2 is a perspective view, nearly full size, of the shank alone. Fig. 3 is a perspective view from a different point of an end of one of the sockets of the shank. Fig. 4 is a cross section of the same and of a pick point therein. Fig. 5 is a perspective view of one of the locking blocks for the sockets. Fig. 6 is a side view of one of the pick points.

The reference numeral 1 designates a portion of the handle of a pick, 2- the metal shank, 3 the eye receiving the handle, 4 the sockets formed integral with the shank, and 5 are the pick points. The sockets are alike but are open at opposite sides of the shank in order better to balance the implement. Each socket is formed with a back or floor 6, from which rises a flange 7 having an overhanging rim 9, as shown in Fig. 2, at one side of the floor, and at the other side rises a flange 10 having a slight slant outward, as shown in Fig. 4;.

In making the pick points 5, I prefer to take a length of bar steel about fourteen inches long, one and an eighth inches wide and half an inch thick, and sharpen one end of it in the usual manner. Nothing else is done to the same, but it is at once in condition for fastening in a socket 4.

The butt end of each point 5 is square and abuts flat against the end wall 11 of a socket, while one edge fits beneath the rim 9 and against the inner surface of the flange 7, while the opposite edge is almost in touch with the surfaces 12 of the abutments 13 and 14. The wedge block 15 is then inserted between the slanting flange 10 and the edge of the point '5, and bolts 16 are put through suitable bolt holes in the floor of the socket at the ends of the wedge block, the heads of the bolts fitting in the rabbeted ends 17. The bolts being firmly tightened, the wedge block is forced down and the pick point strongly fastened in place.

As shown in Fig. i, the surface of the wedge block adjacent to the pick point is rounded over a little to form a limited overhang to insure against the twisting of the point in its socket. To make it easier' to introduce a point 5 in its socket, the rim 9 is given a sloping under face, as shown in Fig. 2. When removing a point for sharpening, it is not necessary to wthdraw the bolts 16, but simply to unloosen them enough to permit the points to be drawn out.

By having the sockets l open at opposite sides of the shank, the pick is much better balanced than would be the case were both heavier parts at the same side. By having the pick points butt flatly against the walls 11 of the sockets, the entire shock of every blow is taken by the shank and there is no strain upon the fastening devices. It will be noted that the sockets are comparatively small and short, so that not only is the pick made comparatively light, and hence more easily operated, but the length of point is made cor-- respondingly extended, thus permitting of its being sharpened and resharpened a maximum number of times, and until there is almost nothing left of it save its butt end. By having no bolt holes or other changes in the butt ends of the points, the expense of the same is reduced to the minimum, and their strength is correspondingly unimpaired. By having the shank and the wedge block made from malleable iron castings, the cost of the entire implement is comparatively small, machine work thereon being also unnecessary.

What I claim is:

1. An implement comprising a shank having a socket formed with an overhung side wall and a rear wall, a point having its butt fitted against the rear wall and overhung by the side wall, and a block having means for forcibly pressing the point laterally against said side wall.

2. An implement comprising a shank having. a socket formed with side walls, one of which walls is inclined, a point having its butt between said side walls, and a wedge block having means for forcibly pressing it in between the inclined wall and the adjacent edge of the point.

8. An implement comprising a shank having a socket formed with side walls one of which is over-hung and the other is inclined, a point having its butt end disposed between the inclined wall and the adjacent edge of the butt, a locking wedge block, and a bolt at each end of the wedge block for forcing it in between the inclined wall and the adjacent edge of the point.

In testimony that I claim the foregoing 15 invention, I have hereunto set my hand this 30th day of July, 1915.

ALBERT H. HARRINGTON.

WVitnesses:

IGNATIUS X. CUTTLE, AGNES G. DEVLIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

